Java Stack Operations Help

[Peter Smith]

New to Java here.
I'm trying to pop the top two elements from a stack, add them together and push the result back onto the stack.

So far I have:

 
    Object a = stack.pop();
    Object b = stack.pop();
    int int1 = Integer.parseInt((String)a);
    int int2 = Integer.parseInt((String)b);
    stack.push(int1 + int2);

It seems to not allow me push an int onto the stack and asks for a token.

push(Token) in Stack <Token> cannot be applied to (int)

[Dheeraj Joshi]

It is working fine if type is not declared to the Stack.

Please post the whole code.

Regards
Dheeraj Joshi